Ingredient or product comparison
Comparison: GHK-Cu vs Other Copper-Binding Peptides and Complexes
GHK-Cu (glycyl-L-histidyl-L-lysine-copper) 16.5 Integrin α2β1, LRP1 receptor 4,000+ genes (genomic studies) 72 hours Gold standard for receptor-mediated gene modulation. Highest documented transcriptional activity among copper peptides Copper bis(glycinate) 12
This source-based comparison does not add ratings or recommend a winner.
- GHK-Cu (glycyl-L-histidyl-L-lysine-copper)
- 16.5
- Integrin α2β1, LRP1 receptor
- 4,000+ genes (genomic studies)
- 72 hours
- Gold standard for receptor-mediated gene modulation. Highest documented transcriptional activity among copper peptides
- Copper bis(glycinate)
- 12.8
- Non-specific mineral absorption
- Minimal direct gene effects
- 30+ days
- Nutritional copper source, not a signaling peptide. No receptor binding, no transcriptional regulation
- Copper-HNKS tetrapeptide
- 14.2
- Unknown (speculative integrin binding)
- Not genomically mapped
- ~96 hours
- Marketing derivative of GHK-Cu with weaker copper affinity. No published mechanism studies
- Serum albumin-copper complex
- 15.6
- Passive copper transport
- None (carrier protein only)
- Indefinite
- Endogenous copper carrier, not a therapeutic target. No tissue repair signaling
- Superoxide dismutase (SOD1) copper cofactor
- 18.0+ (protein-embedded)
- Cytoplasmic antioxidant enzyme
- Indirect (ROS reduction)
- Protein-dependent
- Enzyme cofactor, not a free peptide. Requires intact protein structure for activity
- GHK-Cu's uniqueness lies in combining high copper affinity with receptor-mediated cellular entry and direct transcriptional effects. Copper glycinate delivers copper for enzymatic cofactor roles but doesn't trigger integrin signaling or gene modulation. The HNKS tetrapeptide (histidyl-asparagyl-lysyl-seryl-copper) is sometimes marketed as 'next-generation GHK-Cu' despite lacking published genomic studies or receptor-binding data. It's speculative chemistry without mechanistic validation.